William Dzus obtained his patent in 1934 and established the Dzus Fastener Company out of New York that same year.
https://www.boellhoff.com/us-en/history/ this co. makes modern ones. The company has 18th century roots, and got into helicoils in the 50s. The site glosses over the 40s, probably for reasons. We tend to be US-centric, but a lot of innovation was done all over the world. Maybe another item that got brought back from the war? The open area above the attached panel sure looks just like a Dzus, though. Just not the typical slot head. I bet if you showed this picture to a WW2 aviation specialist, they would tell you the company and typical use.
They might have been hex wrench flat head Dzus fasteners with beveled washers? Did you find any hex wrench versions in their old catalogs? These days they sell these self ejecting ones with the hex.
I agree with this. Camloc's were introduced in 1937 and the patent applied for in 1941. I'm thinking the ones in the photo might actually be Phillips head. Some history at this link: https://www.hfsindustrial.com/news/post/what-is-a-quarter-turn-fastener#:~:text=The Camloc brand was established,well-respected and trusted name.
Camlocs are great ,made of cad plated steel and more durable than Dzus but probably three times heavier , Boeing still use them,theres alot of variations,very durable and the springs hold a lot of tensions for vibration resistance. of course they have military spec numbers.I,ll grab some tomorrow at work and post a picture for you to compare. Theyre used to hold alot of panels and doors for quick access .Johnny
Here’s a vintage one next too a female they have a star washer that holds the male to the female, and a selection of aircraft anchor nuts that get attached to structure and majority would attach using unf fasteners/screws , just to show you the options that could be on the back of those fasteners holding that panel.
Sorry just realized how blurry the photos are , hopefully better ones here if anyone wants references part numbers
Always use the right tool/fastener for the job. Sometimes it's not so easy though when options are endless ;-)
Most common Dzus fastener has a slot in the head. I have seen ones with alen head and butterfly wings.
Ryan If you look at the tab above the fasteners your referring too, you can see the two rivets that hold a camloc base or anchor nut , these hundreds of variations but most are riveted on like a dzus fasteners
I love the example boards. Someone went to a lot of time and effort to mount up and label each one for easy identification. Makes me wonder about the missing examples though. If it was me, I could imagine getting to the end of a job and missing that last fastener needed to finish. I could wait 2-3 days for a new one to come in... but wait a second... I know where there is a spare one Cheers, Harv
@Harv I don't know if they have them in your corner of the globe, but the auto parts store I worked at had boards like that for the various annoying plastic clips for late model stuff, so you could match them up. Beats a computer screen picture or having customers dig through the divided boxes.
I keep seeing this image on Ebay for decals. Would like to know more. Anyone?https://i.ebayimg.com/thumbs/images/g/zloAAOSwKflkvyl4/s-l500.webp
Curb speed you can actually get cam locks with the Mickey Mouse ear tabs dzus and others , there’s a few different ones out of curiosity here’s a apex bit for doused fasteners and el types that we use on speed braces and ratchets , they come in about four different sizes
Can you imagine what those surplus stores looked like when they first started getting all the neat pieces we covet, I would have been like a kid in a candy store.
Possibly some kind of metal "scrivet" as used in many modern automotive panel applications (although now plastic). Aviation Hy-Lok ?
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